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Skyworks Solutions Inc. AAT3258ITS-3.3-R-T1
- Part No.:
- AAT3258ITS-3.3-R-T1
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- 8-TSSOJ (0.094", 2.40mm Width)
- Datasheet:
-
AAT3258ITS-3.3-R-T1.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 8TSOPJW
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
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Product details
Overview
AAT3258ITS-3.3-R-T1 from Skyworks Solutions is a 300mA low-dropout linear regulator with integrated microprocessor reset monitor, delivering 3.3V ±1.5% output voltage at up to 300mA load, 400mV dropout at full load, and active-low push-pull reset output with 150ms timeout-designed for core power in portable microprocessor systems such as cellular handsets and digital cameras.
For engineers reviewing the AAT3258ITS-3.3-R-T1 datasheet, AAT3258ITS-3.3-R-T1 pinout, AAT3258ITS-3.3-R-T1 application, or AAT3258ITS-3.3-R-T1 equivalent, key selection criteria include guaranteed 3.3V LDO accuracy over –40°C to +85°C, independent VDET and VIN inputs for flexible supply partitioning, <71µA quiescent current, and TSOPJW-8 package compatibility with low-ESR ceramic capacitors.
Technical Context
The AAT3258ITS-3.3-R-T1 integrates two functionally isolated circuits: a CMOS-based LDO regulator with fast-start control and active pull-down shutdown, and an independent reset monitor with factory-trimmed 2.63V threshold (±1.5% at 25°C) and 150ms minimum reset timeout. Both sections operate across –40°C to +85°C with separate input pins (VIN for LDO, VDET for reset), enabling dual-rail operation.
Its LDO employs an active error amplifier feedback loop for rapid line/load transient response, supported by BYP pin for 10nF noise-reduction capacitor, while the reset section features MR input with 10µs minimum pulse width, glitch immunity, and internal 30–90kΩ pull-up-ensuring robust brown-out detection and manual reset assertion in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1.5% (25°C), ±2.5% (–40°C to +85°C); ensures stable core logic supply for 3.3V I/O interfaces. |
| Max Output Current | 300mA continuous; supports DSP cores and baseband processors in portable devices. |
| Dropout Voltage | 400mV typical at 300mA; enables >3.7V Li-ion battery operation down to ~3.7V before regulation loss. |
| Quiescent Current | 71µA typical (no load, SHDN = VIN); extends standby time in always-on subsystems. |
| Reset Threshold | 2.63V ±1.5% (AAT3258ITS-3.3-R-T1 variant); triggers reliable reset before 3.3V rail collapse. |
| PSRR | 67dB @ 1kHz (10nF BYP); suppresses switching noise from adjacent DC/DC converters. |
| Operating Temp | –40°C to +85°C ambient; qualified for industrial and handheld consumer environments. |
| Package | 8-pin TSOPJW (2.85 × 2.40 mm, 0.65 mm pitch); space-constrained PCB layout compatible. |
Pinout & Package
8-pin TSOPJW package (2.85 mm × 2.40 mm, 0.65 mm pitch), Pb-free, moisture-sensitive level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | LDO input supply | Accepts 2.5V–5.5V; requires ≥1µF decoupling close to pin for stability and transient immunity. |
| SHDN | LDO enable control | Active-high CMOS input (VIH ≥ 1.5V); ties to VIN for always-on operation or microcontroller GPIO for dynamic power gating. |
| VDET | Reset monitor supply | Independent input (1.2V–5.5V); may be tied to VIN or separate rail to monitor distinct power domain. |
| MR | Manual reset input | Active-low, internally pulled up; accepts mechanical switch or logic signal; asserts reset for ≥150ms after release. |
| RESET | Reset output | Active-low push-pull; drives microprocessor /RESET pin directly; holds low during VDET < 2.63V and for ≥150ms post-recovery. |
| GND | Common ground reference | Single ground plane connection; critical for noise rejection and thermal performance. |
| BYP | LDO reference bypass | Connects 10nF NPO/C0G capacitor to GND to reduce output noise (44.6µVRMS) and improve PSRR. |
| OUT | LDO regulated output | Delivers 3.3V to load; requires ≥2.2µF low-ESR ceramic capacitor to GND for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LDO + µP reset | Single-chip solution eliminates discrete supervisor + regulator BOM, reducing footprint and interconnect complexity. |
| Independent VIN/VDET inputs | Enables LDO regulation from main battery while monitoring backup rail or PMIC output-critical for multi-rail SoC power sequencing. |
| Active output pull-down in shutdown | Internal 1.5kΩ discharge path on OUT pin ensures rapid COUT discharge, preventing backfeed into downstream circuitry. |
| Low-noise LDO with BYP pin | 44.6µVRMS (300Hz–50kHz) achievable with 10nF BYP capacitor-meets noise-sensitive analog/RF supply requirements. |
| Over-temperature & short-circuit protection | 145°C thermal shutdown with 12°C hysteresis and current limiting guard against sustained faults without external components. |
| CMOS-compatible SHDN/MR inputs | VIH/VIL thresholds (1.5V/0.6V) match standard logic families; no level-shifting needed for MCU GPIO interfacing. |
Applications
| Cellular Handset Baseband Power | Digital Camera Image Sensor Core Supply |
|---|---|
Use Scenario: Powers ARM-based baseband processor core in GSM/3G handset during active call and sleep modes. IC Role / Device Role / Timing Role: Provides clean, low-noise 3.3V rail with fast turn-on (<5µs) and controlled shutdown to meet 3GPP power timing requirements. Use Value: 71µA quiescent current extends battery life in standby; 400mV dropout sustains regulation through Li-ion discharge curve. |
Use Scenario: Supplies 3.3V to high-speed CMOS image sensor logic and interface circuitry in compact digital camera modules. IC Role / Device Role / Timing Role: Delivers stable voltage during burst capture sequences where load current swings from 10mA to 300mA within microseconds. Use Value: Fast transient response (60mV load regulation) prevents sensor data corruption; BYP pin enables <50µVRMS noise for low-noise analog front-end. |
| Notebook Computer Embedded Controller (EC) Supply | Handheld Instrumentation Microcontroller Core |
Use Scenario: Powers embedded controller managing keyboard, touchpad, and thermal management in ultra-thin notebooks. IC Role / Device Role / Timing Role: Provides always-on 3.3V supply with manual reset (MR) for firmware recovery and independent VDET monitoring of main 5V rail. Use Value: Dual-input architecture isolates EC operation from main system rail faults; 150ms reset timeout meets Intel EC specification. |
Use Scenario: Supplies 3.3V to Cortex-M4 microcontroller in portable multimeter or oscilloscope with battery backup. IC Role / Device Role / Timing Role: Regulates from single-cell Li-ion (3.0–4.2V) while asserting reset if voltage drops below 2.63V-preventing erratic firmware execution. Use Value: ±1.5% reset threshold accuracy ensures deterministic brown-out behavior; TSOPJW-8 footprint fits tight instrument PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333QDBVRQ1 | 300mA LDO only (no integrated reset); requires external supervisor IC for reset functionality. | Lacks independent VDET/MR pins and 150ms reset timeout; needs additional BOM and board area. | Choose when reset timing is handled externally or when AEC-Q100 automotive qualification is required. |
| MAX809TRD3+T | Standalone reset IC (no LDO); 3.08V threshold, 140ms timeout; no power regulation capability. | Cannot replace LDO function-must pair with separate regulator, increasing component count and layout complexity. | Use only for reset-only monitoring where existing LDO lacks supervisor integration. |
Compared with TPS76333QDBVRQ1 and MAX809TRD3+T, the AAT3258ITS-3.3-R-T1 delivers combined regulation and supervision in one TSOPJW-8 package, eliminating inter-device timing skew, reducing PCB area by ~40%, and enabling independent rail monitoring without external components.
Availability
AAT3258ITS-3.3-R-T1 is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, and handheld instrumentation requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for AAT3258ITS-3.3-R-T1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for wireless, broadband, and industrial markets.
The AAT3258ITS-3.3-R-T1 belongs to Skyworks' MicroPower LDO family, engineered for ultra-low quiescent current and fast transient response in battery-powered portable electronics with integrated power management.
FAQ
What is the output voltage tolerance of the AAT3258ITS-3.3-R-T1 over temperature?
The AAT3258ITS-3.3-R-T1 delivers 3.3V output with ±1.5% tolerance at 25°C and ±2.5% over the full –40°C to +85°C operating range. This is specified in the Electrical Characteristics table (VOUT parameter) and verified across temperature via production test correlation and statistical process control-ensuring reliable logic-level compatibility for 3.3V I/O interfaces in portable systems.
Does the AAT3258ITS-3.3-R-T1 support independent power domains for the LDO and reset functions?
Yes, the AAT3258ITS-3.3-R-T1 has physically separate VIN (LDO input) and VDET (reset monitor input) pins, allowing the LDO to regulate from a main battery while the reset section monitors a different rail-such as a PMIC output or backup supply. This isolation is explicitly documented in the General Description and Pin Descriptions sections of the datasheet.
What is the minimum recommended output capacitor for the AAT3258ITS-3.3-R-T1 at full 300mA load?
The datasheet specifies a minimum 2.2µF low-ESR ceramic capacitor on the OUT pin for stable operation at 300mA load. This value is required to ensure adequate phase margin, load transient response (≤60mV deviation), and PSRR performance-particularly when using the BYP pin with a 10nF capacitor for low-noise operation.
How does the AAT3258ITS-3.3-R-T1 handle shutdown and output discharge?
When SHDN is driven low, the AAT3258ITS-3.3-R-T1 disables the LDO pass element and activates an internal 1.5kΩ pull-down resistor between OUT and GND. This actively discharges the output capacitor-verified in the Turn-Off Response Time waveform (Figure 6)-preventing backfeed into downstream circuitry and enabling safe power sequencing in multi-rail systems.
What reset timeout duration is guaranteed for the AAT3258ITS-3.3-R-T1 after VDET recovers above threshold?
The AAT3258ITS-3.3-R-T1 guarantees a minimum reset active timeout period (TRDY) of 150ms after VDET rises above the 2.63V threshold, with typical values up to 250ms and maximum 400ms. This is measured under all operating conditions and confirmed in the Electrical Characteristics table-ensuring sufficient time for microprocessor initialization before release from reset.
AAT3258ITS-3.3-R-T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-TSSOJ (0.094", 2.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 67dB ~ 45dB (1kHz ~ 100kHz)
- Control Features:
- Enable, Manual Reset, Reset
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSOPJW
AAT3258ITS-3.3-R-T1 FAQ
1.How can I place an order for AAT3258ITS-3.3-R-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AAT3258ITS-3.3-R-T1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AAT3258ITS-3.3-R-T1 reliable?
The price and inventory of AAT3258ITS-3.3-R-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AAT3258ITS-3.3-R-T1 is usually 5 days.
3.What payment methods are accepted for AAT3258ITS-3.3-R-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AAT3258ITS-3.3-R-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AAT3258ITS-3.3-R-T1?
AAT3258ITS-3.3-R-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AAT3258ITS-3.3-R-T1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AAT3258ITS-3.3-R-T1?
For technical support, including AAT3258ITS-3.3-R-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AAT3258ITS-3.3-R-T1 requirements.
6.How does Aetrix verify that AAT3258ITS-3.3-R-T1 is sourced from the original manufacturer or authorized distributors?
All AAT3258ITS-3.3-R-T1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AAT3258ITS-3.3-R-T1 meets industry standards.
7.What is the process for return or replacement of AAT3258ITS-3.3-R-T1?
All AAT3258ITS-3.3-R-T1 units undergo pre-shipment inspection (PSI). If there is an issue with AAT3258ITS-3.3-R-T1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AAT3258ITS-3.3-R-T1 part is unused and in its original packaging.
Return procedure for AAT3258ITS-3.3-R-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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